US4666333A - Manhole casting positioning apparatus - Google Patents
Manhole casting positioning apparatus Download PDFInfo
- Publication number
- US4666333A US4666333A US06/768,138 US76813885A US4666333A US 4666333 A US4666333 A US 4666333A US 76813885 A US76813885 A US 76813885A US 4666333 A US4666333 A US 4666333A
- Authority
- US
- United States
- Prior art keywords
- sleeve unit
- inner sleeve
- casting
- manhole
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005266 casting Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 claims description 26
- 239000004568 cement Substances 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000717 retained effect Effects 0.000 claims description 4
- 239000011449 brick Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
- B28B7/168—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes for holders or similar hollow articles, e.g. vaults, sewer pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
Definitions
- This invention relates to an apparatus, and a method utilizing such apparatus, for positioning a manhole casting in relation to an upper end of a manhole.
- Manholes for sewers, storm drains, and other facilities are typically assembled by stacking a plurality of precast cylindrical concrete barrel sections, typically of a standard height, to the approximate desired height.
- a cylindrical, open ended, concrete lid is then positioned on top of the uppermost of such stacked barrel sections, which concrete lid forms what may be regarded as an upper end of the manhole.
- the lower end of the manhole i.e. the manhole base
- the lower end of the manhole is initially set such that upon such construction, the concrete lid (again referred to as the upper end of the manhole), will sit from 9 inches to 15 inches below a finished road grade.
- a steel or iron casting, which normally supports a lid for the manhole, is then positioned in relation to the upper end of the manhole.
- Such casting typically has a height of about 7 inches so that a 1 inch to 8 inch space is available between the casting and the upper end of the manhole.
- This space is typically filled in by positioning layers of bricks therein, in a process known as bricking, so that an upper end of the casting will sit flush with the road grade.
- the 1 to 8 inch space serves three purposes. First, if minor elevation error is made in the end positioning of the upper end of the manhole, and the road grade, such space serves as a lee way zone for correcting such error. Second, the space allows the casting to be set at various heights or slopes, such that the upper end of it is flush with the road grade. This is conventionally accomplished by using chips of bricks as the final layer during the bricking operation, as required.
- U.S. Pat. No. 3,629,981 to McCaffery discloses an arrangement for altering the height of a manhole lid (as distinguished from a casting), which arrangement consists of an inner casing threadedly engaged in an outer casing.
- U.S. Pat. No. 3,858,998 to Larrson et al discloses an arrangement to alter the angle of a manhole cover. The device of this latter patent utilizes a number of bolts around the cover, which can be independently adjusted so as to alter the angle of the cover.
- U.S. Pat. No. 3,968,600 to Bowman discloses an arrangement which raises the height of a manhole cover, while maintaining it horizontal. This is accomplished by an adjusting ring inserted between the cover and the surface above which the height of the manhole cover is to be raised.
- U.S. Pat. No. 4,038,789 to Axgard et al also has an arrangement for adjusting the height and angle of a manhole cover.
- This arrangement includes an inner frame which can telescope and tilt within an outer frame. Such telescoping and tilting action is accomplished by bolts which apparently bear against an upwardly angled inner surface of the outer frame.
- U.S. Pat. No. 1,639,495 to Frame allows a manhole casting to be tilted by using a number of rings which are rotatable with respect to one another.
- U.S. Pat. No. 2,930,295 to Hale provides a manhole casting height adjustment mechanism, by means of an upper frame which can be raised relative to a lower frame by virtue of threaded studs.
- U S. Pat. No. 4,281,994 to Bowman utilizes a toothed post and mating receptacle assembly, in order to allow raising of a manhole cover only.
- the assembly has a number of sections adjustable with respect to one another so that the assembly can be accomodated within different diameter manholes.
- None of the above devices disclose a relatively simple means for positioning a manhole casting, which device can be readily reused in a method to readily accomplish such positioning for many castings, and which is further of relatively simple construction.
- the bricking method of accomplishing such positioning is apparently still in wide use.
- the present invention provides a casting positioning apparatus, which is used to position a casting in relation to an upper end of manhole.
- the apparatus includes a sleeve unit which has open upper and lower ends, and which is moveable in lateral dimensions between a first position and a second position. In the first position, the lower end of the sleeve unit can freely engage with the upper end of the manhole. In the second position, the upper end of the sleeve unit can support the casting in a position mounted on it, while at the same time an engaging section of the lower end of the sleeve unit can frictionally engage against a side of the upper end of the manhole.
- Such frictional engagement is with sufficient force such that the sleeve and the mounted casting can be supported by such engagement, while allowing the upper end of the sleeve to be moved with respect to the upper end of the manhole.
- the casting can be positioned with respect to the upper end of the manhole.
- a sleeve unit adjusting means is additionally provided for retaining the sleeve unit in the second position.
- the foregoing sleeve unit is an inner sleeve unit the lower end of which can freely enter the upper end of the manhole, when the sleeve unit is in the retracted position.
- engaging section of the lower end of the inner sleeve unit can frictionally engage against the inside of the upper end of the manhole, so as to support the inner sleeve and the casting mounted thereupon.
- the upper end of the inner sleeve can simultaneously be moved as previously described.
- the positioning apparatus additionally usefully has an outer sleeve unit having open upper and lower ends.
- Such outer sleeve unit has lateral dimensions such that it can freely engage over a casting mounted on the inner sleeve, while still leaving a gap between the casting and the outer sleeve.
- the frictional engagement which can be obtained between the inner sleeve unit and the inside of the upper end of the manhole, is sufficient such that fluid cement can be retained between the inner and outer sleeve units.
- the inner and outer sleeves are generally cylindrical in shape, in order that they can be readily used with the typical generally cylindrical upper end of a manhole.
- the outer sleeve unit is preferably moveable in lateral dimensions between a first and second position, the second position allowing the outer sleeve unit to engage over a casting as described.
- an outer sleeve unit adjusting means is provided for retaining the outer sleeve unit in the expanded position.
- the engaging section of the inner sleeve preferably comprises a laterally expandable gasket disposed about the lower end of the sleeve.
- the gasket has an outer surface which can firmly frictionally engage against the inside surface of an upper end of the manhole when the inner sleeve is in the expanded position.
- An inner surface of the gasket though, is such as to allow an inner sleeve of the inner sleeve unit, to move frictionally thereagainst so that the upper end of the inner sleeve unit can be moved as already mentioned. This is usefully accomplished by the outer surface of the gasket having a plurality of vertically spaced ridges around it, while the inner surface of the gasket is substantially smooth.
- the inner sleeve unit is preferably constructed such that when in the expanded position with the engaging section engaged against the inside of the upper end of the manhole, the upper end of the inner sleeve unit can be moved vertically and tilted with respect to the upper end of the manhole. Further preferably, a peripheral edge of an end of the inner sleeve, is disposed at an angle to an upwardly extending axis of the inner sleeve.
- the inner sleeve is further preferably arranged to be invertible in use with the upper end of the manhole. That is, the inner sleeve is such that the "upper" end of it can function as the lower end by inverting the inner sleeve.
- the outer sleeve unit may usefully be constructed in the form of a belt.
- the outer sleeve adjusting means has a receptacle formed in a first end of the belt, through which receptacle a second end of the belt can pass.
- the outer sleeve adjusting means further comprises locking means disposed on the receptacle, for locking the second end of the belt in a position passing through the receptacle, corresponding to the retracted position of the outer sleeve unit.
- a method of positioning a casting, utilizing the above apparatus, is further provided.
- the method basically involves placing the lower ends of the inner sleeve unit in frictional engagement with the inside of the upper end of the manhole, and retaining it therein by its respective adjusting means.
- the outer sleeve unit is freely engaged over the mounted casting and the inner sleeve unit, while the outer sleeve unit is in the second position. This is such that the outer sleeve unit rests on the upper end of the manhole with an upper end of the outer sleeve unit extending above a lowermost end of the mounted casting. Either before or after the lower end of the outer sleeve is so positioned, the casting can be mounted upon the upper end of the inner sleeve unit.
- the casting can be positioned with respect to the upper end of the manhole, by repeatedly striking the mounted casting. Following all of this, cement can be poured between the inner and outer sleeve units, to a height above a lowermost end of the mounted casting such that the cement, when cured, will retain the casting in position relative to the upper end of the manhole.
- FIG. 1 is a perspective view of an inner sleeve unit of an apparatus of the present invention
- FIG. 2 is a vertical cross section along the line 2--2 of FIG. 1;
- FIG. 3 is a perspective view of an outer sleeve unit of an apparatus of the present invention.
- FIGS. 4-7 are perspective views, which illustrate in sequence the manner of using the apparatus of FIGS. 1-3 to position a casting relative to an upper end of a manhole.
- inner sleeve unit 2 which consists of an inner sleeve 4, and which has open upper and lower ends 6, 8, respectively.
- inner sleeve unit 2 is shown in a 180° inverted position in FIG. 1, from its position during normal use, as will be described later.
- a peripheral edge 12 of upper end 8 is disposed at an angle to an upwardly extending axis of inner sleeve unit 2, that is an axis which extends upwardly through open upper and lower ends 6, 8, respectively.
- Inner sleeve 4 of inner sleeve unit 2 is constructed of a material such that it is laterally expandable from a contracted position as shown in FIG. 1, to an expanded position as best shown in FIGS. 4 and 6.
- Inner sleeve unit 2 includes a generally cylindrical gasket 14 disposed around the lower end 8 of inner sleeve unit 2.
- Gasket 14 is of a material such that it is laterally expandable with the remainder of inner sleeve unit 2, when inner sleeve unit 2 moves to the expanded position.
- Gasket 14 has on its outer surface, a plurality of vertically spaced ridges 18 extending thereabout.
- An inner surface 20 of gasket 14, is substantially smooth and fairly snugly grips against inner sleeve 4.
- An inner sleeve unit adjusting means is provided, for reversably moving inner sleeve unit 2, between the retracted and expanded positions, and for retaining it in either of such positions.
- the inner sleeve adjusting means consists of three turnbuckles 22, the ends 24 of which are attached by means of studs extending from inner sleeve unit 4, and corresponding nuts.
- Turnbuckles 22 can be adjusted by means of a ratchet 26, shown in FIG. 1 in a position removeably engaged upon one of the turnbuckles.
- the casting positioning apparatus also includes a substantially cylindrical outer sleeve 30, which has an open upper end 32, and an open lower 34.
- Outer sleeve 30 is preferably constructed in the form of a belt, with a first end 36 of such belt, having a receptacle 38 through which a second end 39 of such belt, can pass.
- Receptacle 38 has three threaded bores into which are fitted three mating bolts 40 (preferably having a wing nut type head).
- Bolts 40 and the mating threaded bores in receptacle 38 act as locking means disposed on receptacle 38, to retain the second end 36 at a desired position within receptacle 38.
- Outer sleeve unit 30 is also made of a material such that it can be moved between an expanded position such as shown in FIG. 3, to a retracted position such as shown in FIG. 6. When bolts 40 are loosened of course, this permits such contraction, for example by pulling on second end 36. Bolts 40 can then be tightened against second end 36, to retain outer sleeve 30 in the contracted position.
- outer sleeve unit 30 is typically made of a heavy, somewhat resilient, plastic to allow for movement of the foregoing sleeve units between their expanded and contracted positions.
- inner sleeve 4 and outer sleeve unit 30, can both can be conveniently made from flat strips of such plastic.
- a flat strip could conveniently have the following dimensions for inner sleeve 4:
- Outer sleeve unit 30, in such situation, may usefully have the following diemensions:
- FIGS. 4 through 7 show an upper end 40 of a manhole, which upper end 40 has an outer side 46, an inner side 42 (sometimes referred to in this application, simply as the outside and inside respectively, of the upper end), and an upper surface 44. Again, in a typical manhole, inner side 42 will have a diameter of about 25 inches.
- a casting 50 to be positioned in relation to upper end 40, is shown most clearly in FIGS. 5 and 6. Casting 50 has an upper end 52, and a lower end 54 which includes a radially outwardly extending flange 56.
- Casting 50 further has an inside lip 58, with an upper edge 60 upon which a conventional manhole lid can rest, and a lower edge 62.
- inside lip 58 has an inside diameter of 24 inches, that is one inch less than the inside diameter of a typical upper end 40 of a manhole (i.e. the inside diameter of the upper end 40 being taken as the diameter of the inner side 42 thereof).
- an engaging section of inner sleeve 2 that is in the embodiment of inner sleeve 2 illustrated, gasket 14, is frictionally engaged against inner side 42 of upper end 40. Because of the nature of turnbuckles 22, these will of course retain inner sleeve section 2 in the expanded position. The degree of the foregoing frictional engagement will depend upon the diameter of inner sleeve section 2 when in the expanded position.
- inner sleeve section 2 will be able to engage against the inner side 42 of upper end 40, with sufficient force such that both inner sleeve unit 2 and a casting mounted thereupon as will shortly be described and as shown in FIG. 5, can both be supported by such engagement.
- frictional engagement must be sufficient to allow inner sleeve section 2 to act as a part of a concrete form, as again will shortly be described.
- inner sleeve unit 2 when inner sleeve unit 2 is in the expanded position, it is still able to be moved with respect to upper end 40 of the manhole to position casting 50 mounted thereupon, in relation to upper end 40. Such movement is allowed by virtue of inner sleeve 4 being able to slide to some degree along the substantially smooth inside surface 20 of gasket 14, while outside surface 16 is firmly frictionally engaged against inner surface 42 of upper end 40 of the manhole, so as to be normally immovable with respect thereto when inner section 2 is in the expanded position.
- Inner sleeve 4 though, and gasket 14, are constructed though such that the movement which inner sleeve 4 can accomplish past inner surface 20, when inner sleeve unit 2 is in the expanded position, is such as to allow vertical and tilting movement of inner sleeve 4 with respect thereto, although such movement meets with considerable frictional resistance.
- such movement can only normally be accomplished while inner sleeve unit 2 is in the expanded position, by the application of blows to inner sleeve section 2 (preferably indirectly by applying such blows to casting 50 mounted thereupon) such as by striking with a hammer.
- Casting 50 is then mounted on upper end 6 of inner sleeve unit 2, as shown in FIG. 5.
- lip 58 will have an inside diameter which is slightly less than the diameter of inner sleeve unit 2 when in the expanded position (the latter diameter corresponding approximately to the diameter of inner side 42 of upper end 40)
- casting 50 is able to rest on inner sleeve unit 2 when in the expanded position, by virtue of lower end 62 of lip 58 resting upon upper end 6 of inner sleeve unit 2.
- upper end 6 of inner sleeve unit 2 when in the expanded position shown in FIG. 4 would have an inside diameter of approximately 25 inches, whereas lip 58 would have inside diameter of approximately R5 24 inches.
- lower end 62 of lip 58 would rest upon upper end 6 of inner sleeve unit 2.
- Casting 50 then, in particular upper end 52 thereof, can then be positioned with respect to upper end 40 of the manhole, by striking casting 50 with a hammer or the like, to move casting 50 and the upper end 6 of inner sleeve unit 2, to the required elevation and angle.
- upper end 52 of casting 50 could be inclined at an angle such that a lower portion of upper end 52 of casting 50, could be as much as 1.5 inches below an upper portion thereof, without any substantial distortion of inner sleeve 4.
- gasket 14 can be moved to upper end 6 of inner sleeve unit 2, and inner sleeve unit 2 then inverted such that upper end 6 thereof would then engage within upper end 40 of the manhole.
- outer sleeve unit 30 is positioned in at least a partially expanded position, of sufficient lateral dimensions (in the present case, diameter) such that it can be freely engaged over casting 50 when in the mounted position shown in FIG. 5.
- freely engaged in the foregoing terms, is meant without any substantial frictional engagement therebetween.
- Such arrangement further leaves at least some gap between casting 50 and outer sleeve 30, such as space 70 shown in FIG. 6. Outer sleeve 30 will then be allowed to rest upon upper end 40.
- fluid cement can then be poured into gap 70 between inner sleeve unit 2 and outer sleeve unit 30, such that inner sleeve unit 2 and casting 50 mounted thereupon, outer sleeve unit 30, and upper surface 44 of upper end 40 of the manhole, will all serve as a cement form.
- the cement is poured to a height above a lowermost end of the mounted casting 50 (the lowermost end being flange 56) such that when the cement is cured, casting 50 will be retained in position above upper end 40 of the manhole.
- bolts 40 can then be slackened to expand outer sleeve unit 30, and turn buckles 22 of inner sleeve unit 2 also adjusted to contract inner sleeve unit 2 to the retracted position. In such positions, one will be able to remove both inner sleeve unit 2 and outer sleeve 30, leaving only the cured concrete retaining casting 50 in the required position.
- Such cured concrete will have a smooth finish on its radially inner and outer surfaces, as a result of the smoothness of inner sleeve 4 and outer sleeve unit 30. Furthermore, there will not be any noticeable amounts of rough cement drippings on the inner surface 42 of upper end 40, since gasket 14 of inner sleeve unit 2, will substantially prevent fluid cement from passing thereby during the above operation.
- gasket 14 might be dispensed with, although there may be a greater tendency of fluid cement to leak past such an inner sleeve unit when used in the method described above.
- one might for some purposes dispose both an upper and a lower peripheral edge of the inner sleeve unit, at an angle to the upwardly extending axis thereof.
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Abstract
Description
Claims (25)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US06/768,138 US4666333A (en) | 1985-08-22 | 1985-08-22 | Manhole casting positioning apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/768,138 US4666333A (en) | 1985-08-22 | 1985-08-22 | Manhole casting positioning apparatus |
Publications (1)
Publication Number | Publication Date |
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US4666333A true US4666333A (en) | 1987-05-19 |
Family
ID=25081650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US06/768,138 Expired - Lifetime US4666333A (en) | 1985-08-22 | 1985-08-22 | Manhole casting positioning apparatus |
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US (1) | US4666333A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747453A (en) * | 1987-03-06 | 1988-05-31 | Howard Sr Oscar | Security cover and housing for a well |
US4844402A (en) * | 1988-07-01 | 1989-07-04 | Ronald Werner | Form for a mortar cap |
US5634739A (en) * | 1989-09-29 | 1997-06-03 | Armstrong; Ronald B. | Manhole casting positioning apparatus and method |
WO1997033048A1 (en) * | 1996-03-05 | 1997-09-12 | Armstrong Ronald B | Improved manhole casting positioning apparatus and method |
US6209586B1 (en) * | 1999-12-01 | 2001-04-03 | James R. Wright | Aggregate retaining device for drain covers |
US6340035B2 (en) | 1999-12-01 | 2002-01-22 | James R. Wright | Aggregate retaining device for drain covers |
US20030081999A1 (en) * | 2001-09-28 | 2003-05-01 | Godfrey Steven A. | Hydraulically adjustable manhole ring |
US20070081857A1 (en) * | 2005-10-07 | 2007-04-12 | Yoon Jung H | Four parts manhole enabling an easy install and height adjustment |
GB2465644A (en) * | 2008-11-29 | 2010-06-02 | David Shaw | Flexible plastic shuttering for manhole construction |
US8858114B2 (en) | 2012-05-25 | 2014-10-14 | Chris Gaspar | Adjustable support apparatus for a utility access cover |
US9435098B1 (en) * | 2015-05-20 | 2016-09-06 | Esmaeil Esrafili | Floating precast manhole and catch basin cover systems |
US9845586B2 (en) | 2013-07-22 | 2017-12-19 | Ronald ARMSTRONG | Manhole frame with one or more handholds |
US10323429B1 (en) | 2012-06-15 | 2019-06-18 | Olaf Mjelde | Low profile circular drain with water stop for swimming pool |
US10458093B2 (en) * | 2017-10-16 | 2019-10-29 | Jeffrey Allan Gilbert | On-site manhole casting system |
US10731314B2 (en) * | 2017-06-12 | 2020-08-04 | Kenneth S. Barton | System for sealing a manhole riser ring assembly |
US10934730B2 (en) | 2018-01-15 | 2021-03-02 | Hayward Industries, Inc. | In-floor swimming pool drain and sump assembly |
US11053658B2 (en) | 2019-09-19 | 2021-07-06 | Trevor Brien | Height adjustment mechanism for a manhole assembly and manhole assembly comprising the same |
US11643832B1 (en) | 2012-06-15 | 2023-05-09 | Aquastar Pool Products, Inc. | Low profile circular drain with water stop for swimming pool and diverter for use therein |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2166632A (en) * | 1936-12-05 | 1939-07-18 | Bell Telephone Labor Inc | Method of constructing concrete manholes |
FR2303122A1 (en) * | 1975-03-03 | 1976-10-01 | Levaillant Christian | Fixing of manhole cover frames - by placing in annular rebate in road surface and filling with synthetic resin and hardener |
US4050839A (en) * | 1976-08-27 | 1977-09-27 | Vollmar Ronald D | Process for raising manholes |
JPS5811226A (en) * | 1981-07-14 | 1983-01-22 | Haneda Fume Can Kk | Manufacture of regulating ring for manhole and product thereof |
DE3220480A1 (en) * | 1982-05-29 | 1983-12-01 | Erhard 6927 Bad Rappenau Beck | Releasable shaft formwork |
-
1985
- 1985-08-22 US US06/768,138 patent/US4666333A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2166632A (en) * | 1936-12-05 | 1939-07-18 | Bell Telephone Labor Inc | Method of constructing concrete manholes |
FR2303122A1 (en) * | 1975-03-03 | 1976-10-01 | Levaillant Christian | Fixing of manhole cover frames - by placing in annular rebate in road surface and filling with synthetic resin and hardener |
US4050839A (en) * | 1976-08-27 | 1977-09-27 | Vollmar Ronald D | Process for raising manholes |
JPS5811226A (en) * | 1981-07-14 | 1983-01-22 | Haneda Fume Can Kk | Manufacture of regulating ring for manhole and product thereof |
DE3220480A1 (en) * | 1982-05-29 | 1983-12-01 | Erhard 6927 Bad Rappenau Beck | Releasable shaft formwork |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747453A (en) * | 1987-03-06 | 1988-05-31 | Howard Sr Oscar | Security cover and housing for a well |
US4844402A (en) * | 1988-07-01 | 1989-07-04 | Ronald Werner | Form for a mortar cap |
US5634739A (en) * | 1989-09-29 | 1997-06-03 | Armstrong; Ronald B. | Manhole casting positioning apparatus and method |
WO1997033048A1 (en) * | 1996-03-05 | 1997-09-12 | Armstrong Ronald B | Improved manhole casting positioning apparatus and method |
US6557588B2 (en) | 1999-12-01 | 2003-05-06 | Splash Pool Plastics, Inc. | Aggregate retaining device for drain covers |
US6209586B1 (en) * | 1999-12-01 | 2001-04-03 | James R. Wright | Aggregate retaining device for drain covers |
US6340035B2 (en) | 1999-12-01 | 2002-01-22 | James R. Wright | Aggregate retaining device for drain covers |
US20030081999A1 (en) * | 2001-09-28 | 2003-05-01 | Godfrey Steven A. | Hydraulically adjustable manhole ring |
US6692183B2 (en) | 2001-09-28 | 2004-02-17 | Steven A. Godfrey | Hydraulically adjustable manhole ring |
US20070081857A1 (en) * | 2005-10-07 | 2007-04-12 | Yoon Jung H | Four parts manhole enabling an easy install and height adjustment |
GB2465644A (en) * | 2008-11-29 | 2010-06-02 | David Shaw | Flexible plastic shuttering for manhole construction |
GB2465644B (en) * | 2008-11-29 | 2013-03-13 | David Shaw | Manhole chambers |
US8858114B2 (en) | 2012-05-25 | 2014-10-14 | Chris Gaspar | Adjustable support apparatus for a utility access cover |
US10745926B1 (en) | 2012-06-15 | 2020-08-18 | Olaf Mjelde | Low profile circular drain with water stop for swimming pool |
US11225806B1 (en) | 2012-06-15 | 2022-01-18 | Olaf Mjelde | Low profile circular drain with water stop for swimming pool |
US10323429B1 (en) | 2012-06-15 | 2019-06-18 | Olaf Mjelde | Low profile circular drain with water stop for swimming pool |
US11643832B1 (en) | 2012-06-15 | 2023-05-09 | Aquastar Pool Products, Inc. | Low profile circular drain with water stop for swimming pool and diverter for use therein |
US11555321B1 (en) | 2012-06-15 | 2023-01-17 | Aquastar Pool Products, Inc. | Low profile circular drain with water stop for swimming pool |
US11396759B2 (en) | 2012-06-15 | 2022-07-26 | Aquastar Pool Products, Inc. | Low profile circular drain with water stop for swimming pool |
US10030351B2 (en) | 2013-07-22 | 2018-07-24 | Ronald ARMSTRONG | Manhole frame with one or more handholds |
US10030350B2 (en) | 2013-07-22 | 2018-07-24 | Ronald ARMSTRONG | Manhole frame with one or more handholds |
US10030352B2 (en) | 2013-07-22 | 2018-07-24 | Ronald ARMSTRONG | Manhole frame with one or more handholds |
US9845586B2 (en) | 2013-07-22 | 2017-12-19 | Ronald ARMSTRONG | Manhole frame with one or more handholds |
US9435098B1 (en) * | 2015-05-20 | 2016-09-06 | Esmaeil Esrafili | Floating precast manhole and catch basin cover systems |
US10731314B2 (en) * | 2017-06-12 | 2020-08-04 | Kenneth S. Barton | System for sealing a manhole riser ring assembly |
US10458093B2 (en) * | 2017-10-16 | 2019-10-29 | Jeffrey Allan Gilbert | On-site manhole casting system |
US10934730B2 (en) | 2018-01-15 | 2021-03-02 | Hayward Industries, Inc. | In-floor swimming pool drain and sump assembly |
US11053658B2 (en) | 2019-09-19 | 2021-07-06 | Trevor Brien | Height adjustment mechanism for a manhole assembly and manhole assembly comprising the same |
US11649604B2 (en) | 2019-09-19 | 2023-05-16 | Trevor Brien | Height adjustment mechanism for a manhole assembly and manhole assembly comprising the same |
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